Northern Mongoloid
Encyclopedia
Northern Mongoloid population
Population
A population is all the organisms that both belong to the same group or species and live in the same geographical area. The area that is used to define a sexual population is such that inter-breeding is possible between any pair within the area and more probable than cross-breeding with individuals...

s are a subgroup of Mongoloid populations, distinguished by older criteria like appearance and craniology, or dental patterns.

In Cavalli-Sforza's genetic clustering work (1988) South Chinese join Southeast Asians in genetic clustering while the North Chinese genetically cluster with Koreans, Japanese, Ainu, Bhutanese and Tibetans. Xiao and Cavalli-Sforza (2000) find the boundary between Northern and Southern Mongoloid
Southern Mongoloid
Southern Mongoloid populations are a subgroup of Mongoloid populations, distinguished by older criteria like appearance and craniology, or dental patterns....

s to approximate the Yangtze River
Yangtze River
The Yangtze, Yangzi or Cháng Jiāng is the longest river in Asia, and the third-longest in the world. It flows for from the glaciers on the Tibetan Plateau in Qinghai eastward across southwest, central and eastern China before emptying into the East China Sea at Shanghai. It is also one of the...

, and suggest that their ancestors arrived from Africa via separate routes. Principal component analysis of gene frequencies of Chinese populations

Other scientists have suggested that the finding of sharp genetic differences between North and South China is an artifact of using an insufficient number of samples. However, Xiao and Cavalli-Sforza (2000) used a larger number of samples than previous studies.

Modern biological evidence from the anthropological textbook Human Species (2003) contradicts earlier theories of which groups were more genetically related to other groups. The Human Species(2003) and Physical Anthropology used the genetic clustering of Cavalli-Sforza (2000) in their publication. More interestingly, Asians have very local genetic clusters inside these regions, implying different Asian ethnic groups have not historically intermarried with each other. Examples of localized genetic clusters include Japan, Korea, Mongolia and China which form separate genetic clusters from each other.

More modern evidence based on genetic studies suggests that East Asians indeed cluster together with respect to Caucasians. A "North-South" East Asian divide also appears to be supported within this group, located at the Yangtze river.
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